Being resourceful

How many solutions can you find to this sum? Each of the different letters stands for a different number.

Charlie and Abi put a counter on 42. They wondered if they could visit all the other numbers on their 1-100 board, moving the counter using just these two operations: x2 and -5. What do you think?

Using the digits 1 to 9, the number 4396 can be written as the product of two numbers. Can you find the factors?

In 15 years' time my age will be the square of my age 15 years ago. Can you work out my age, and when I had other special birthdays?

Can you select the missing digit(s) to find the largest multiple?

Use these four dominoes to make a square that has the same number of dots on each side.

Some of the numbers have fallen off Becky's number line. Can you figure out what they were?

Can you find any two-digit numbers that satisfy all of these statements?